26 A substance that dissolves in water and produces hydronium ions as the only positive ions in the solution is classified as

(1) an alcohol (3) a base

(2) an acid (4) a salt

Which of the following statements about the effective nuclear charge (Zeff) is correct? a. Zeff increases across a period and is relatively constant down a group. b. Zeff decreases across a period and increases down a group. c.

You placed 5.5 grams of salt in 10 ml of water. What is the w/v%

All of the following are a source of carbon in the carbon cycle except: Sunlight Sediment Animals Fossil Fuels

Three identical 10 L tanks contain 6 mol of helium (He) at 293 K. The pressure in each of the tanks is increased as described below: Tank A: The tank volume is decreased from 10 L to 5 L while the temperature and the number of moles of He remain

What potential source of laboratory accident is present in this experiment? Explain the procedure you will follow to minimize this hazard.

Which two bases pair with each other?

What is the main cause of increased erosion

Where should you keep your glass of soda if you want it to remain fizzy

Why do the atoms in a piece of copper metal have no net charge? -The charges of the positive and negative copper ions cancel each other out. -The number of electrons surrounding each copper nucleus doesn't change.

In a closed system, the total heat given off by warmer substances equals the total heat energy gained by cooler substances (qwater = - qliquid).